Pumps – Expansible chamber type – Moving cylinder
Patent
1977-04-07
1979-11-06
Freeh, William L.
Pumps
Expansible chamber type
Moving cylinder
417539, 417457, 417559, F04B 1902, F04B 2100
Patent
active
041734351
ABSTRACT:
A plunger pump includes a pump housing and a plunger extending into a pumping chamber of the pump housing. A sleeve valve is mounted only on the plunger for reciprocation therewith and also for displacement longitudinally of the plunger and subdivides the pumping chamber, when in its closed position, into a suction space without, and pressure space within, the sleeve valve. An inlet communicates with the suction space, and an outlet with the pressure space, the latter having a one-way valve therein which opens during the pumping stroke of the plunger. A flexible diaphragm ring extends across a spacing between the pump housing and the sleeve valve and is sealingly connected to these components. The diaphragm ring is flexible and urges the sleeve valve toward its closed position. A liquid seal may be accommodated in a compartment separated from the suction space by the diaphragm ring.
REFERENCES:
patent: 214764 (1879-04-01), Fagan
patent: 2756679 (1956-07-01), Meader
patent: 2983480 (1961-05-01), Greenlie
patent: 3435733 (1969-01-01), Enke
patent: 4024770 (1977-05-01), Liesenborghs
patent: 4036564 (1977-07-01), Richards
Freeh William L.
Paul Hammelmann Maschinenfabrik
Striker Michael J.
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